Underfolio

Every trading day › 2026

The stock market on October 1, 2026

October 1, 2026, a Thursday. Of 3,270 US stocks that traded, 1,802 rose and 1,397 fell.

Stocks that rose1,802of 3,270; 1,397 fell
Biggest companyNvidiaby market value that day

Biggest rises among the 500 largest companies

Synopsys (SNPS)+12.8%
Fair Isaac (FICO)+11.7%
Coherent, Inc. - Common Stock (COHR)+10.9%

Biggest falls among the 500 largest companies

Alnylam Pharmaceuticals Inc (ALNY)-6.3%
Insmed Inc (INSM)-4.9%
Danaher Corporation (DHR)-4.4%

Stock moves count dividends; the index is price only. Market values after 2024 are estimates.

‹ September 30, 2026 · Every October 1

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.